Thanks folks, appreciate the feedback on my first thread!
Being near London, I doubt there will be many bargains - we’ve used the dealer here for our Euphonic for a few years and generally had a good relationship. Even when they’ve made mistakes, they’ve owned up to them and accepted the consequences.
All being well, we’ll remain happy customers for some time. Oddly there aren’t many other options for main dealer near us, so being tied to this one isn’t that big a risk, I hope (and I expect to have to stick with main dealer with the PCP as @Overdrive suggests)
Costs feel a little bit break even, rather than bargain so far, but I’m assuming it also insulates us against any unexpected costs during those services, which wouldn’t be covered by warranty. Definitely something to check out before I sign anything!